Improvement in double-piston engines



UNITED STATES PATENT EEICE.-

ALBERT w. MoEEELL, or NILEs, MICHIGAN, AssIGNoE or ONE-HALE Hrs EIGHT ToPEELEY HALE, JE.

IMPROVEMENT IN DVOUBLEPISTON ENGINES.

Specification forming part of Letters Patent No. 107,524, datedSeptember 20, 1870.

.T0 LZZ whom, it may concern Be it known that I, ALBERT W.- MOEEELL, ofNiles, in the county of Berrien and State of Michigan, have invented aDouble #Acting Piston-Power for Engines or Pumps, of which the followingis aspecification.

My invention relates to the combination of three pistons in the samecylinder, and to the arrangement thereof for receiving or applying powerin connection with other machinery. The combination is made in such amanner as to dispense with cylinder-heads, and can be simply changedfrom an engine to a pump by easily reversing the action of the valve. Iuse but one steam-chest in an engine constructed on these principles,and have the double action of steam or compressed air upon the pistons.To change an engine of this kind into a pump, change the position of thevalve so that suction of the pump will be through the exhaustpipe oftheengine, and the How of the element, whether water, air, yNc., from thepump will be through the supply-oriiice to the engine.

The object of the invention is to produce a double engine in onecylinder.

L In the accompanying drawings, Figure l is a view of an engineembodying the principles of my invention. Fig. 2 is -a sectional view ofthe cylinder, showing ythe arrangement of the pistons.

O O O O is the cylinder; A B D, the pistons; C E E, the piston-rods; FG, openings from the chest S into the cylinder; H, the valve; K, thesupply-pipe to an engine; Q, the eX- haust to an engine. i

Operation: When the pistons A D B have the position represented in Fig.2, steam passes from the chestS through the orificeG into the `by aconnecting-rod and crank.

` l chamber formed -by the pistons A I), and the cylinder O O O O,forcingV the piston A to the position represented by the dotted lines L,and the piston D tothe position indicated by the dotted lines M. Thepistons Aand B are secured to the same rod, C. Consequently, when thepistonA is forced to the position L, the piston B must follow to theposition N. When the piston D has assumed theposition indicated by M,and B that indicated by N, the valve II is drawn to the front end of thesteam-chest, and steam is permitted to enter the chamber inclosedbetween M and N, through the orifice F, forcing N to B, M to D, and L toA. The pistoirrod C passes freely through thecross-head I?, Fig. l, andissef cured to the cross-head R, from which motion is communicated tothe shaft of the iiy-wheel The rod C, Fig. 2, works through astuffing-box in the piston D. The piston D is attached to the rods E E,which pass through stufngboxes in the piston A, and are secured to thecross-head P, from which motion is communicated to the fly-wheel byconnecting-rods land cranks-y` Thus, by the action of steam (orcompressed air) between the pistons alternately, continu ous motion isimparted to the iiy-wheel, and a very effective engine obtained.

I claimn y Ihe combination and arrangement of three pistons` in onecylinder, substantially in -the manner and for the purpose herein setforth.

ALBERT W. MORRELL.

Witnesses:

ADDISON E. STONE, PEELEY HALE, Jr.A

